Stores also owe the litter tax, 0.015% of gross proceeds from listed products including candy, and late state returns carry penalties of 9%, then 19%, then 29% in total (RCW 82.19.010, RCW 82.19.020, RCW 82.32.090).

Sal Stores also owe the litter tax. It's fifteen thousandths of one percent of gross proceeds from products like food, groceries and soft drinks, which includes candy, collected on the same schedule as B and O.
Sal Pay late, and the penalty runs nine, then nineteen, then twenty-nine percent in total.